Free on-site gate assessment - hinges, posts, and your LiftMaster or Nice gate operator checked before anything is quoted
The assessment is free and the quote is the invoice.
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AfterFast, Reliable Gate Motor & Opener Across San Mateo
When a gate motor dies in San Mateo, you need a straight answer: what’s wrong, what it costs, and when we can fix it. Gate motor and opener repair in San Mateo typically runs $220-$480 for most motor replacements, and we carry parts for Linear, Viking, Ghost Controls, and DoorKing on the truck. Hal Gatewood has been fixing gates since 2001, and our Gate Motor & Opener crew answers the phone with a live person 24/7. Call (877) 610-2993 and you’ll get a real person who knows the difference between a 94404 corrosion failure and a 94402 slope problem.
We work all over San Mateo, from the Mariners Island lagoon streets to the hillside estates above El Camino Real. The moment you tell us your cross streets, we know what your gate is up against.
Why Gatewood Fence & Gate Is San Mateo’s Preferred Gate Motor & Opener Company
We’re the company Hal put his name on. Not a franchise, not a dispatch board. Hal Gatewood started this shop in 2001 with a welder, a truck, and a simple rule: fix the gate right or don’t fix it at all. When Hal’s crew shows up at your San Mateo driveway, you’re getting the same guy who will answer if you call back in three months. Our published shop address and state license are available for anyone to look up, and every job carries the 90-Day Done Right Promise in writing. If it’s not done right, one call brings us back. No runaround.
San Mateo reviews tell the story. Homeowners on the 94404 bay side mention how fast we replace salt-corroded operator boards. Hillsborough-adjacent customers in 94402 mention how we recalibrate gate motors on steep driveways instead of selling a new motor. That’s the repair-first difference. We fix what’s failing, not what’s convenient to swap. The person who shows up is background-checked and uniformed, and the estimate you get on the phone is the price you pay. No trip charge anywhere inside the county.
Our Gate Motor & Opener Services in San Mateo
We handle the full range of gate motor and opener work in San Mateo, but four services come up most often. Here’s what that looks like on the ground.
Motor Installation
A new Gate Installation in San Mateo has to fit the gate you already have and the conditions it lives in. For 94404 homes near the water, we recommend marine-grade housings and conformal-coated circuit boards from day one. For 94402 hillside gates, we calculate the gate’s weight, slope, and travel distance before recommending a motor, because an undersized motor on a steep grade burns out fast. Installation includes full safety sensor setup to meet UL 325, which California requires for any automated gate.
Motor Repair
Most San Mateo Gate Repair jobs are fixable, not replacement jobs. Capacitors blow, limit switches drift, circuit boards corrode. We diagnose on site with the gate still in your driveway, and we weld on site if the mounting bracket or rack needs work. We don’t haul your gate away. That’s how other operators pad a bill. Our job is to strip back the years of marine-layer damage and get your gate moving again, usually same day.
Linear Motor
Linear motors power the slide gates you see throughout San Mateo’s HOA communities, particularly the newer developments in 94403 and 94404. We service all major Linear models, and we stock the common Linear control boards, gear assemblies, and safety arrays locally, which means faster turnaround for San Mateo customers. A linear motor on a slide gate near the bay is doing two jobs: moving the gate and resisting salt-air pitting on the rack. We address both.
Slide Motor
Slide gates are the standard for San Mateo HOA entry points and many residential driveways, especially where a swing gate would clip a slope or block a sidewalk. Slide motors take the most abuse in this city because they live low to the ground where salt air and moisture collect. We align racks, replace rollers, and recalibrate travel limits so the motor isn’t fighting the gate. If your slide gate in San Mateo is grinding, slow, or stopping mid-travel, that’s a fixable problem in most cases.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Mateo
We’re certified to service nine major gate motor brands, and on any given week in San Mateo we’re working on Linear, Viking, Ghost Controls, and DoorKing systems. That matters because these motors fail differently. A Viking swing arm on a 94402 estate gate usually needs slope recalibration. A Linear slide motor in 94404 usually needs corrosion work on the board and rack. We know which parts each brand eats through in this climate, and we stock accordingly. If we don’t have it on the truck, we get it fast because we’re local, not ordering from a warehouse in another state.
Common Gate Motor & Opener Problems We See in San Mateo Homes
- Salt-air corrosion on board and housing. Bay-front neighborhoods like Mariners Island in 94404 get a constant drizzle of marine air that eats operator circuit boards within five to seven years. We see green-tinted connectors and pitted motor housings on gates that are barely old enough for their first service.
- Slope-induced motor overload on hillside gates. The 94402 hills north of Alameda de las Pulgas climb fast, and gate motors not calibrated for that grade draw too much current. Capacitors pop, gears strip, and the motor trips its overload repeatedly until someone fixes the actual slope issue.
- HOA entrapment-sensor failures locking gates open. HOA communities in 94403 and 94404 defer maintenance until a photocell or loop detector fails, which triggers California’s UL 325 safety lockout. The gate refuses to move until the sensor issue is resolved, which is when our phone rings.
- Marine-layer moisture on original ornamental gates. Many San Mateo ranch homes from the 1940s and 1950s still have their original wrought-iron side gates with add-on motors. Years of marine-layer humidity cycling has fatigued the iron and compromised the motor mounts. We weld the frame, reinforce the mount, and save the gate.
Pricing for Gate Motor & Opener in San Mateo, CA
Here’s what you can expect to pay for gate motor and opener work in San Mateo, based on the jobs we do most often.
| Service | Typical San Mateo Price Range |
|---|---|
| Gate motor diagnostic and minor repair | $180-$340 |
| Linear slide motor replacement | $450-$850 |
| Control board replacement (salt-corroded) | $220-$480 |
| Full slide motor installation with safety sensors | $900-$1,600 |
| Battery backup retrofit | $350-$650 |
| Intercom integration with existing motor | $300-$700 |
What affects the number: gate length and weight, slope grade, corrosion exposure, and whether we’re matching an HOA-approved spec. Every price is quoted and agreed in writing before any work starts. If you already have a written estimate from another company, bring it and we’ll give you a free second opinion. We offer $40 off any repair over $200, and seniors and veterans get a permanent 10% discount. Call (877) 610-2993 for an exact quote. Estimates are free.
We Also Serve Cities Near San Mateo
Besides our work across San Mateo proper, we regularly run gate motor and opener calls in Foster City, Belmont, Hillsborough, and Redwood Shores. Each of those cities has its own gate challenges, but the same rules apply: fix it in place, quote it upfront, stand behind it with the 90-Day Done Right Promise. San Mateo is home base for a lot of our calls, but the truck goes where the gate is.
Serving San Mateo, CA - Our Local Coverage Area
We’re based in the San Mateo area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Gate Motor & Opener in San Mateo
Yes. Many San Mateo HOAs, especially the condominium and gated communities in 94403 and 94404, require architectural committee approval before any gate motor or visible hardware is changed. That approval typically covers motor housing color, gate style consistency, and safety compliance. We’ve worked with enough San Mateo management companies to know what passes on the first submission, and we’ll provide spec sheets and UL 325 documentation to include with the application. Call (877) 610-2993 and we’ll walk you through what your specific HOA is likely to require.
Yes, if you want the motor to last. Standard gate motors installed in 94404 and the bay-adjacent parts of 94403 routinely show board corrosion and housing pitting within five to seven years. We recommend conformal-coated control boards and marine-grade stainless hardware for these locations, which we stock and install regularly. The upfront cost is modest, and it’s the difference between a 6-year motor and one that runs twice as long. Call (877) 610-2993 to get a corrosion-resistant motor spec for your location.
Yes, and we do this often in San Mateo HOA communities where the intercom was installed years before the gate motor was upgraded. We wire the new linear motor’s control board to the existing intercom relay so residents keep their call buttons, directory, and entry codes without replacing the whole system. The key is matching signal voltages and adding a relay isolation so motor noise doesn’t interfere with intercom audio. We handle that on site. Call (877) 610-2993 and tell us what intercom brand is on the gate.
Your gate motor is likely undersized for the slope, or its current limit was never calibrated for the grade. The hillside neighborhoods west of El Camino Real in 94402 have driveways that climb fast, and a gate motor working against gravity draws more current than the same motor on flat ground. If the overload trips repeatedly, either the capacitor is boiling, the gearbox is binding, or the motor is simply under-spec’d for a gate that heavy on that incline. We diagnose it on site and recalibrate or replace as needed. Call (877) 610-2993 for a slope-correct motor assessment.
Yes. Battery backup retrofits are common in San Mateo HOA communities where a power outage leaves the entry gate dead and residents locked out or stuck outside. We install a battery array and charging circuit that takes over automatically when PG&E power drops, keeping the gate operational for a set number of cycles. It also prevents the gate from slamming shut or locking mid-travel during a brownout. Call (877) 610-2993 for a battery backup quote. The price is fixed before we start.
Written by Hal Gatewood, Owner at Gatewood Fence & Gate, serving San Mateo with pride and a 90-Day Done Right Promise since 2001.